Improved machine for centering butts



y essary. j

'a1/autismo i@ strat @jiji-ire EMERY PARKER, NEW BRITAIN, GONNJEC'IICUI, ASSIGNOIt 'TO RUSSELL d; ERWIN rMANUFAGIURING COMPANY, 0E SAME PLACE.v

i Letters Patent No. 105,488, dated July 1t), 1870.

MOO-* IMPROVED MACHIE IEORV CENTERIN G- BUTTS.

` The Schedule referred to' in these Letters Patent and making part of the same To all whom` t may concern:

Be it known that I, Enviar Pannen, of New Britain, in ,the county oi'v Hartford and State of Gonnecticut,`have invented a` new and useful Machine for Centering Buttsyund L do'hereby declare that the to provide an apparatus .for centering the holesfor the joint pins of buttfhinges,preparatory to drilling such -holes through the axes" of the knuckles of the hinge.

1twould be quite practicable with this machine to complete the holes, but` `there are-certain economical reasons which make. it preferable that the holes should be first accurately started or centered, and then, afterward, drilledy byv another operation.

A A are two drills,which. aremounted in" suitablev beaiings arnaud are driven` by power. yTheir axes are perfectly coincidentand Ieach drill is furnished' withfa rest, B, (figs. 1.and 3;) which lworks Vin dovetail groovesc, (tig. 2,) audisrfitted to. be adjusted at any distance froiu they point of ther-drill lwhichmay be nec- .'Ihe drills, ,while revolviug,`7should be capable of being moved foralimited'distanceiin `the line of their L axes by devices well understood, and not necessary to be represented inthe drawing.' 4

Dis a fiat-surfacedtable,V upon which the leaf of the hinge to be ceutered'is placed; and E E are, respectively, back-rests `and gauges, made vadjustable to accommodatediinges' of dilferent sizes,vv and to determine the position of 4the hinges upon the table.

The table D rests upon a wedge-piece, Dgthe under side of which is inclined at "an, angle to ahorizontal plane of, `say thirty degrees, imore or. less, and thetop `surface of tho base-piece F, which `-supports b oth wedge D and table D, is `inclined at a corresponding angle.

Wheu'the wedge D and the base-piece F are so placed thattheir inclined surfaces are complementary, `it isclear that the `plane of thc table D will be raised or lowered as the wedge D' is moved up or-down t-hc inclined surface of the base-piece F A convenient vmeans for adjusting the elevation of ythe plane of the tableD is the screw G, which is tapped into a hole in the baseF, andisworked by a thumbpiece, b.

A yoke, H, depends from the front under edge of,V

the wedge D', and embraces the shank of the screw G between two flanges ou such shank, and, by turning said screw to the right or to the left, the wedge will be advanced or drawn backward, and the table D be-elevated or lowered. Y

For holding the leaf of the hinge firmly upon the table, a clamp-nut, I, may be used, which is made to upress upon :the surfaceot Ythe hinge when the screw K is turned, and to tilt backwardl clear of the hinge,

by the reaction of the spring L, so soon as the screw K is slackened.` i

The machine is adapted for centering the leaves of jointed hinges, or of loose jointed butts, b oth right and.

left-handed, though it will be necessary to shift the rests for the drills when it is proposed tofchauge from right to lefthandcd butts, and. provision is made for such cases by extra rests'suited to Abutt-s of different hands which are fitted to the dovetail grooves a. y

IVhat I claim-as my invention, `and desire to secure by Letters Patent, is

The improved machine for centering the holes for joint-pins of hinges, which consists of 'the following elementsin combination; The drills A A, adjustable rests B '15,and table'D, with mechanism for adjusting it vertically, said table being provided with gauges E "Q substantially as described.

Witnesses:

"\M. J.'Wo0DRUFF,

H. E. RUSSELL, 2d.

EMERY PARKER. 

